LCD-LED DisplayLights and Display Board Circuits

Blinker Indicator Schematic Circuit Diagram

Innovative Blinker Indicator for Cars and Models

This inventive blinker indicator is designed for use in both cars and models, offering a unique visual display. When the directional signal is activated, the running-light display elegantly progresses either to the left or right, creating a captivating light-show effect. For enthusiasts of eye-catching visual displays, this circuit proves to be quite impressive.

Dual Counter Setup for Dynamic Displays

The circuit comprises two counters, namely IC2 and IC3, strategically arranged to produce the dynamic running-light effect. These counters are effectively reset to zero via capacitors C4 or C7, respectively, each time a blinker lamp (La) illuminates. This reset mechanism ensures a smooth progression of the running-light display. However, the display halts after completing one cycle, as the highest counter output is cleverly connected to the Enable input, introducing an element of control to the visual spectacle.

Blinker Indicator Schematic Circuit Diagram

Efficient Reset Mechanism for Continuous Progression

In this setup, when the lamp extinguishes, a timely reset pulse is generated to the corresponding counter through NAND gate IC1.A or IC1.B, ensuring a seamless cycle. The counter then starts counting anew, allowing for continuous progression of the display. The speed of this progression can be finely tuned to the desired pace using the adjustable resistor P1. Remarkably, only one LED is active at any given time, except in the hazard blinker mode. This deliberate design choice facilitates effortless brightness adjustment through the use of resistor R12. Furthermore, an interesting modification can be implemented by replacing the standard diodes with LEDs. In this setup, all cathodes are connected to the ground via R12, adding a captivating visual dimension to the circuit.

NAND Gate: A Versatile Logic Component

The NAND gate, derived from the fusion of an AND gate and a NOT gate, stands as a versatile logic component. When combined with other gates, NAND and NOR gates earn the title of universal gates due to their ability to perform fundamental operations. Constructed using transistors and junction diodes, a two-input NAND gate operates as a digital combination logic circuit. Its logic function, expressed as A • B = A + B by De Morgan’s laws, equates a NAND gate to a series of inverters followed by an OR gate.

NAND Gate Functionality: A Logical Inversion

A NAND gate with two inputs functions as a digital circuit that provides the logical inverse of an AND gate. In the NAND Gate truth table, unlike an AND gate that yields a logical “1” only when both inputs are “1,” a NAND gate outputs a logical “0” for the same input combination. This distinctive behavior adds flexibility and computational depth to digital circuits.


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